For converting avi video clips to 3gp (to play on a Razr v3m) I tried SUPER, 3gp_Converter, and Prism before finding Quick Media Converter. I found SUPER confusing, 3g_Converter was easy to use but the video quality was choppy at every setting. Prism was also easy to use, but the video quality was only marginally better than 3gp_converter. Quick Media Center, on the other hand, was very easy to use and gave me the best quality of any of the others, using only the default settings. Video is smooth, no video/audio sync problems, perfect.
Price: Free review details